Health impact and cost of ivermectin mass treatment, 1995–2015.

The health impact is expressed as the annual number of DALYs averted. Costs include those taken on by the African Programme for Onchocerciasis Control (APOC) and national onchocerciasis task forces (including beneficiary governments and non-governmental development organizations). All costs are expressed in nominal US$ (i.e., uncorrected for inflation and undiscounted), and do not include cost of donated drugs or government salaries.
*National onchocerciasis task force expenditures for the years 1995–2003 and 2010 were unknown; they were assumed to be equal to 47% of APOC expenditures, based on known expenditures for the years 2004–2009.
**Expenditures for 2011–2015 were estimated based on the expected number of treatments in that period multiplied by the estimated cost per treatment in 2010 ($0.52).